Not logged in
PANGAEA.
Data Publisher for Earth & Environmental Science

Jarrard, Richard D; Schaar, Ralph (1991): Electrical properties of basalts of ODP Sites 124-768 and 124-770 [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.762188, Supplement to: Jarrard, RD; Schaar, R (1991): Electrical properties of basalts from Sites 768 and 770. In: Silver, EA; Rangin, C; von Breymann, MT; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 124, 91-104, https://doi.org/10.2973/odp.proc.sr.124.172.1991

Always quote citation above when using data! You can download the citation in several formats below.

RIS CitationBibTeX CitationShow MapGoogle Earth

Abstract:
Conductivity of 54 basalt samples from ODP Sites 768 and 770 was measured as a function of temperature and fluid salinity. Porosity was also measured for all samples, and cation exchange capacity was measured for 46 of the samples. Porosity measurements indicated that porosity is underestimated for basalts like these, unless one uses extensive drying at high vacuum.
At salinities greater than 29 ppt, and throughout the range of salinity and temperatures likely in situ, sample conductivity (Co) is controlled by porosity (phi) according to the Archie relation Co = 0.22*Cw phi*1-3 (orFF = 4.5/f1.3), where Cw is conductivity of the pore fluids and FF = Cw/CO is the formation factor. At lower salinity, clay-surface conduction or microcrack conduction may dominate. We are unable to distinguish reliably between the two mechanisms, but we do detect their effects subtly at high salinity and strongly at low salinity.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 6.477227 * Median Longitude: 122.525693 * South-bound Latitude: 5.144800 * West-bound Longitude: 121.219800 * North-bound Latitude: 8.000000 * East-bound Longitude: 123.668400
Date/Time Start: 1988-12-01T14:30:00 * Date/Time End: 1988-12-30T18:00:00
Event(s):
124-768C * Latitude: 8.000000 * Longitude: 121.219800 * Date/Time Start: 1988-12-01T14:30:00 * Date/Time End: 1988-12-13T07:00:00 * Elevation: -4396.0 m * Penetration: 1268.5 m * Recovery: 525.69 m * Location: Sulu Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 100 cores; 915 m cored; 0 m drilled; 57.5 % recovery
124-770B * Latitude: 5.144800 * Longitude: 123.668300 * Date/Time Start: 1988-12-21T06:45:00 * Date/Time End: 1988-12-24T08:00:00 * Elevation: -4516.0 m * Penetration: 474.1 m * Recovery: 112.41 m * Location: Mindanao Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 21 core; 201.6 m cored; 0 m drilled; 55.8 % recovery
124-770C * Latitude: 5.144800 * Longitude: 123.668400 * Date/Time Start: 1988-12-24T08:00:00 * Date/Time End: 1988-12-30T18:00:00 * Elevation: -4516.0 m * Penetration: 529.5 m * Recovery: 54.81 m * Location: Mindanao Sea * Campaign: Leg124 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 12 cores; 115.8 m cored; 0 m drilled; 47.3 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

Download Data

Download ZIP file containing all datasets as tab-delimited text — use the following character encoding:

Datasets listed in this publication series

  1. Jarrard, RD; Schaar, R (1991): (Table 4) Cation exchange capacity for basalts of ODP Sites 124-768 and 124-770. https://doi.org/10.1594/PANGAEA.762187
  2. Jarrard, RD; Schaar, R (1991): (Table 2) Conductivity measurements as a function of temperature and salinity at ODP Sites 124-768 and 124-770. https://doi.org/10.1594/PANGAEA.762185
  3. Jarrard, RD; Schaar, R (1991): (Table 1) Index properties for basalts from ODP Sites 124-768 and 124-770. https://doi.org/10.1594/PANGAEA.762184